package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;

import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Override
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO){
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        
        //像菜品表插入数据
        dishMapper.insert(dish);
        //获取insert语句生成的主键值
        Long dishId = dish.getId();
        //相口味表插入数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors!=null && flavors.size() > 0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            dishFlavorMapper.insertBatch(flavors);
        }

    }

    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO){
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page=dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }



    @Override
    public void deleteBatch(List<Long> ids){
        //是否能删除 起售中
        for (Long id: ids) {
            Dish dish= dishMapper.getById(id);
            if(dish.getStatus()== StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //是否关联套餐
        List<Long> setmealDishIds = setmealDishMapper.getSetmealDishIds(ids);
        if(setmealDishIds!=null&&setmealDishIds.size()>0){
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        for (Long id:ids) {
            dishMapper.deleteById(id);
            dishFlavorMapper.deleteByDishId(id);
        }


    }
    @Override
    public DishVO getByIdWithFlavor(Long id){
        //根据id查菜品
        Dish dish = dishMapper.getById(id);

        //查口味
        List<DishFlavor> dishFlavors= dishFlavorMapper.getByDishId(id);
        //封装
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    @Override
    public void updateWithFlavor(DishDTO dishDTO){
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //修改菜品基本表信息
        dishMapper.update(dish);

        //删除菜品原有口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());

        //重新插入
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors!=null && flavors.size() > 0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            dishFlavorMapper.insertBatch(flavors);
        }
    }
    @Override
    public List<Dish> list(Long categoryId){
        Dish dish=Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }
}
